<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>

  <div class="phoneDiv">
    <iframe style="width:100%;height:100%;"
     src="https://mobile.baidu.com/?tn=88093251_57_hao_pg" frameborder="0"></iframe>
  </div>
    
</body>
<style>
  *{
    margin:0;
    padding:0;
  }
  .phoneDiv{
      background: red;
      width:375px;
      height: 667px;
  }
</style>
</html>